diff --git a/tools/lsd/common.h b/tools/lsd/common.h
new file mode 100644
index 0000000..6447b10
--- /dev/null
+++ b/tools/lsd/common.h
@@ -0,0 +1,12 @@
+#ifndef COMMON_H
+#define COMMON_H
+
+#include <libelf.h>
+#include <elf.h>
+
+#define unlikely(expr) __builtin_expect (expr, 0)
+#define likely(expr)   __builtin_expect (expr, 1)
+
+#define MIN(a,b) ((a)<(b)?(a):(b)) /* no side effects in arguments allowed! */
+
+#endif/*COMMON_H*/